Patents by Inventor Won-Gu Choi

Won-Gu Choi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11851588
    Abstract: The present invention provides an adhesive tape including: a base material; and an adhesive sheet provided on one surface of the base material and including cured products of an aqueous acrylic adhesive composition, in which the adhesive sheet has a porous structure including pores, and wherein the adhesive tape has a water vapor transmission rate of 3,000 g/m2·day or more and 5,000 g/m2·day or less under conditions of a temperature of 40° C. and a relative humidity of 20%, and a method for manufacturing the same.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: December 26, 2023
    Inventors: Jeong-In Han, Won-Gu Choi, Jang-Soon Kim, Tae-Yi Choi, Ji-Yeon Yang, Dan-A Kim, Seo-Hyeon Park
  • Patent number: 11512152
    Abstract: A method of preparing an acrylic adhesive, in which the durability of an adhesive film may be improved through additional photocuring and the residual components according to solution photopolymerization are efficiently removed, and an adhesive film prepared therefrom.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: November 29, 2022
    Inventors: Jun Man Choi, Sang Hwan Kim, Jang Soon Kim, Kwang Su Seo, Won Gu Choi, Chi Gwan An
  • Patent number: 11261353
    Abstract: The present invention relates to a rubber-based adhesive composition and a rubber-based adhesive using the same, the composition including: a rubber-based resin; and a rosin-based resin having at least one hydrophilic group.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: March 1, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Seung-Won Lee, Eun-Kyung Park, Won-Gu Choi, Jang-Soon Kim, Sang-Hwan Kim, Tae-Yi Choi
  • Patent number: 10787594
    Abstract: The present invention relates to an optical adhesive composition including: a thermosetting component including an isoprene-based rubber containing a carboxyl group, and a thermal curing agent; and a photo-curable component including an acrylic acid ester-based monomer, and a photoinitiator, in order to exhibit high barrier performance on the basis of a low water vapor transmission rate, and simultaneously, exhibit excellent adhesive performance by being applied to an optical device or a display device. In addition, the present invention provides an optical adhesive film including an adhesive layer including a photo-cured product of the optical adhesive composition, thereby obtaining advantages of ensuring an excellent cutting property and an excellent handling property, and improving a step difference absorbency.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: September 29, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Seung-Won Lee, Eun-Kyung Park, Tae-Yi Choi, Won-Gu Choi, Jang-Soon Kim
  • Publication number: 20200140725
    Abstract: The present invention relates to a rubber-based adhesive composition and a rubber-based adhesive using the same, the composition including: a rubber-based resin; and a rosin-based resin having at least one hydrophilic group.
    Type: Application
    Filed: January 3, 2020
    Publication date: May 7, 2020
    Inventors: Seung-Won LEE, Eun-Kyung PARK, Won-Gu CHOI, Jang-Soon KIM, Sang-Hwan KIM, Tae-Yi CHOI
  • Publication number: 20190338165
    Abstract: A method of preparing an acrylic adhesive, in which the durability of an adhesive film may be improved through additional photocuring and the residual components according to solution photopolymerization are efficiently removed, and an adhesive film prepared therefrom.
    Type: Application
    Filed: February 27, 2018
    Publication date: November 7, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Jun Man Choi, Sang Hwan Kim, Jang Soon Kim, Kwang Su Seo, Won Gu Choi, Chi Gwan An
  • Patent number: 10435598
    Abstract: Provided are an adhesive bonding composition for optical use and a multistage curing method thereof, the composition including a methacrylate-based monomer and an acrylate-based monomer, in which a weight ratio of the methacrylate-based monomer to the acrylate-based monomer ranges from about 1:1 to about 1:10.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: October 8, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Bo-Ra Yeon, Bu-Gi Jung, Sang-Hwan Kim, Kyung-Joon Yoon, Jang-Soon Kim, Won-Gu Choi
  • Patent number: 10407701
    Abstract: The present invention relates to a method for preparing a (meth)acrylate group-containing benzophenone for an optical adhesive use, the method including: preparing a raw material composition by mixing a hydroxy group-containing benzophenone-based compound and a (meth)acrylate-based compound; and carrying out a reaction of the hydroxy group-containing benzophenone-based compound and the (meth)acrylate-based compound by introducing an enzyme catalyst into the raw material composition. Further, the present invention provides an optical adhesive composition including a (meth)acrylate group-containing benzophenone prepared by the preparation method and a derivative thereof.
    Type: Grant
    Filed: February 21, 2017
    Date of Patent: September 10, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Jang Soon Kim, Kwang Su Seo, Won Gu Choi
  • Patent number: 10364380
    Abstract: The present invention provides an adhesive composition for optical use, which includes rubber and may be chemically cross-linked through an appropriate curing process, and as a result, may secure excellent long-term durability, water vapor transmission resistance, and chemical resistance, and includes an isobutylene-isoprene rubber having an acrylic acid ester-based functional group in a main chain thereof, a photoinitiator, and a tackifier in order to provide optical characteristics sufficient to be used for optical use. The present invention provides a method for preparing the adhesive composition for optical use, and it is possible to obtain the adhesive composition for optical use, which includes a chemically cross-linkable rubber by the method. Further, the present invention provides an adhesive film for optical use, and excellent long-term durability and optical characteristics may be implemented by applying the adhesive film for optical use to a wide range of electronic devices.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: July 30, 2019
    Assignee: LG Chem, Ltd.
    Inventors: Kwang Su Seo, Eun Kyung Park, Seung Won Lee, Jang Soon Kim, Won Gu Choi, Tae Yi Choi
  • Publication number: 20180148613
    Abstract: The present invention relates to a rubber-based adhesive composition and a rubber-based adhesive using the same, the composition including: a rubber-based resin; and a rosin-based resin having at least one hydrophilic group.
    Type: Application
    Filed: October 28, 2015
    Publication date: May 31, 2018
    Inventors: Seung-Won LEE, Eun-Kyung PARK, Won-Gu CHOI, Jang-Soon KIM, Sang-Hwan KIM, Tae-Yi CHOI
  • Patent number: 9976059
    Abstract: The present invention relates to an adhesive composition for optical use, which is applied to optical devices or display devices and thus may exhibit excellent adhesion performance while exhibiting a high barrier performance based on a low water vapor transmission rate, and may implement both excellent optical characteristics and durability, and specifically, provides an adhesive composition for optical use, the adhesive composition including: a thermally curable rubber including an isobutylene-isoprene rubber having a carboxyl group and an isobutylene-isoprene rubber having a hydroxy group; and a thermal crosslinking agent. Further, the present invention provides an adhesive film for optical use, including an adhesive layer including photocured products of the adhesive composition for optical use.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: May 22, 2018
    Assignee: LG Chem, Ltd.
    Inventors: Kwang Su Seo, Eun Kyung Park, Seung Won Lee, Jang Soon Kim, Won Gu Choi, Tae Yi Choi
  • Publication number: 20180127624
    Abstract: The present invention provides an adhesive tape including: a base material; and an adhesive sheet provided on one surface of the base material and including cured products of an aqueous acrylic adhesive composition, in which the adhesive sheet has a porous structure including pores, and wherein the adhesive tape has a water vapor transmission rate of 3,000 g/m2·day or more and 5,000 g/m2·day or less under conditions of a temperature of 40° C. and a relative humidity of 20%, and a method for manufacturing the same.
    Type: Application
    Filed: February 23, 2017
    Publication date: May 10, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jeong-In Han, Won-Gu Choi, Jang-Soon Kim, Tae-Yi Choi, Ji-Yeon Yang, Dan-A Kim, Seo-Hyeon Park
  • Publication number: 20180119180
    Abstract: The present invention relates to a method for preparing a (meth)acrylate group-containing benzophenone for an optical adhesive use, the method including: preparing a raw material composition by mixing a hydroxy group-containing benzophenone-based compound and a (meth)acrylate-based compound; and carrying out a reaction of the hydroxy group-containing benzophenone-based compound and the (meth)acrylate-based compound by introducing an enzyme catalyst into the raw material composition. Further, the present invention provides an optical adhesive composition including a (meth)acrylate group-containing benzophenone prepared by the preparation method and a derivative thereof.
    Type: Application
    Filed: February 21, 2017
    Publication date: May 3, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Jang Soon Kim, Kwang Su Seo, Won Gu Choi
  • Publication number: 20180057715
    Abstract: The present invention relates to an optical adhesive composition including: a thermosetting component including an isoprene-based rubber containing a carboxyl group, and a thermal curing agent; and a photo-curable component including an acrylic acid ester-based monomer, and a photoinitiator, in order to exhibit high barrier performance on the basis of a low water vapor transmission rate, and simultaneously, exhibit excellent adhesive performance by being applied to an optical device or a display device. In addition, the present invention provides an optical adhesive film including an adhesive layer including a photo-cured product of the optical adhesive composition, thereby obtaining advantages of ensuring an excellent cutting property and an excellent handling property, and improving a step difference absorbency.
    Type: Application
    Filed: March 22, 2016
    Publication date: March 1, 2018
    Applicant: LG Chem, Ltd.
    Inventors: Seung-Won Lee, Eun-Kyung Park, Tae-Yi Choi, Won-Gu Choi, Jang-Soon Kim
  • Publication number: 20170342300
    Abstract: Provided are an adhesive bonding composition for optical use and a multistage curing method thereof, the composition including a methacrylate-based monomer and an acrylate-based monomer, in which a weight ratio of the methacrylate-based monomer to the acrylate-based monomer ranges from about 1:1 to about 1:10.
    Type: Application
    Filed: December 2, 2015
    Publication date: November 30, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Bo-Ra Yeon, Bu-Gi Jung, Sang-Hwan Kim, Kyung-Joon Yoon, Jang-Soon Kim, Won-Gu Choi
  • Publication number: 20170327714
    Abstract: The present invention relates to an adhesive composition for optical use, which is applied to optical devices or display devices and thus may exhibit excellent adhesion performance while exhibiting a high barrier performance based on a low water vapor transmission rate, and may implement both excellent optical characteristics and durability, and specifically, provides an adhesive composition for optical use, the adhesive composition including: a thermally curable rubber including an isobutylene-isoprene rubber having a carboxyl group and an isobutylene-isoprene rubber having a hydroxy group; and a thermal crosslinking agent. Further, the present invention provides an adhesive film for optical use, including an adhesive layer including photocured products of the adhesive composition for optical use.
    Type: Application
    Filed: November 4, 2016
    Publication date: November 16, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Kwang Su Seo, Eun Kyung Park, Seung Won Lee, Jang Soon Kim, Won Gu Choi, Tae Yi Choi
  • Publication number: 20170313917
    Abstract: The present invention provides an adhesive composition for optical use, which includes rubber and may be chemically cross-linked through an appropriate curing process, and as a result, may secure excellent long-term durability, water vapor transmission resistance, and chemical resistance, and includes an isobutylene-isoprene rubber having an acrylic acid ester-based functional group in a main chain thereof, a photoinitiator, and a tackifier in order to provide optical characteristics sufficient to be used for optical use. The present invention provides a method for preparing the adhesive composition for optical use, and it is possible to obtain the adhesive composition for optical use, which includes a chemically cross-linkable rubber by the method. Further, the present invention provides an adhesive film for optical use, and excellent long-term durability and optical characteristics may be implemented by applying the adhesive film for optical use to a wide range of electronic devices.
    Type: Application
    Filed: November 4, 2016
    Publication date: November 2, 2017
    Applicant: LG Chem, Ltd.
    Inventors: Kwang Su Seo, Eun Kyung Park, Seung Won Lee, Jang Soon Kim, Won Gu Choi, Tae Yi Choi
  • Patent number: 9534149
    Abstract: The present invention relates to an adhesive film and to a touch panel. According to the present invention, even when the adhesive film is applied to a touch panel, for example, a capacitive touch panel, and directly attached to a conductive layer, the adhesive film effectively prevents the resistance of the conductive layer from being raised and exhibits good heat resistance. In addition, according to the present invention, an adhesive film having superior durability, optical characteristics, cuttability, workability, wettability and resistance to warping is provided.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: January 3, 2017
    Assignee: LG HAUSYS, LTD.
    Inventors: Jang-Soon Kim, Min-Seok Song, Eok-Hyung Lee, Won-Gu Choi, Jae-Gwan Lee, Yong-Hoon Lee, Hak-Rhim Han
  • Patent number: 9315699
    Abstract: Provided is an adhesive composition comprising: a thermosetting epoxy resin formed with an epoxy copolymer containing a hydroxyl group; and a UV curable epoxy resin having an epoxy equivalence of 100 g/eq to 500 g/eq.
    Type: Grant
    Filed: September 4, 2013
    Date of Patent: April 19, 2016
    Assignee: LG HAUSYS, LTD.
    Inventors: Sang Hwan Kim, Yong Hoon Lee, Dai Hyun Kim, Won Gu Choi, Jang Soon Kim
  • Patent number: 9139757
    Abstract: Disclosed is a sealing film for electronic paper having a multilayered structure. The multilayered film for electronic paper comprising a layered structure according to the present invention comprises: (a) a sealing layer formed with a material comprising a UV curable polymer resin composition or a UV transmitting polymer resin composition; and (b) a tack-free adhesive layer formed with a material comprising a UV curable polymer resin. The sealing film has excellent sealing properties and is tack-free at room temperature, and thus it is possible to minimize freezing of electrostatic particles inside a microcup sticking to the surface of a sealing material during manipulation thereof.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: September 22, 2015
    Assignee: LG HAUSYS, LTD.
    Inventors: Jang Soon Kim, Yong Hoon Lee, Won Gu Choi